1 /* lnstat - Unified linux network statistics
2 *
3 * Copyright (C) 2004 by Harald Welte <laforge@gnumonks.org>
4 *
5 * Development of this code was funded by Astaro AG, http://www.astaro.com/
6 *
7 * Based on original concept and ideas from predecessor rtstat.c:
8 *
9 * Copyright 2001 by Robert Olsson <robert.olsson@its.uu.se>
10 * Uppsala University, Sweden
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 */
18
19 /* Maximum number of fields that can be displayed */
20 #define MAX_FIELDS 128
21
22 /* Maximum number of header lines */
23 #define HDR_LINES 10
24
25 /* default field width if none specified */
26 #define FIELD_WIDTH_DEFAULT 8
27 #define FIELD_WIDTH_MAX 20
28
29 #define DEFAULT_INTERVAL 2
30
31 #define HDR_LINE_LENGTH (MAX_FIELDS*FIELD_WIDTH_MAX)
32
33 #include <unistd.h>
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <string.h>
37 #include <getopt.h>
38
39 #include <json_writer.h>
40 #include "lnstat.h"
41
42 static struct option opts[] = {
43 { "version", 0, NULL, 'V' },
44 { "count", 1, NULL, 'c' },
45 { "dump", 0, NULL, 'd' },
46 { "json", 0, NULL, 'j' },
47 { "file", 1, NULL, 'f' },
48 { "help", 0, NULL, 'h' },
49 { "interval", 1, NULL, 'i' },
50 { "keys", 1, NULL, 'k' },
51 { "subject", 1, NULL, 's' },
52 { "width", 1, NULL, 'w' },
53 { "oneline", 0, NULL, 0 },
54 };
55
usage(char * name,int exit_code)56 static int usage(char *name, int exit_code)
57 {
58 fprintf(stderr, "%s Version %s\n", name, LNSTAT_VERSION);
59 fprintf(stderr, "Copyright (C) 2004 by Harald Welte <laforge@gnumonks.org>\n");
60 fprintf(stderr, "This program is free software licensed under GNU GPLv2\nwith ABSOLUTELY NO WARRANTY.\n\n");
61 fprintf(stderr, "Parameters:\n");
62 fprintf(stderr, "\t-V --version\t\tPrint Version of Program\n");
63 fprintf(stderr, "\t-c --count <count>\t"
64 "Print <count> number of intervals\n");
65 fprintf(stderr, "\t-d --dump\t\t"
66 "Dump list of available files/keys\n");
67 fprintf(stderr, "\t-j --json\t\t"
68 "Display in JSON format\n");
69 fprintf(stderr, "\t-f --file <file>\tStatistics file to use\n");
70 fprintf(stderr, "\t-h --help\t\tThis help message\n");
71 fprintf(stderr, "\t-i --interval <intv>\t"
72 "Set interval to 'intv' seconds\n");
73 fprintf(stderr, "\t-k --keys k,k,k,...\tDisplay only keys specified\n");
74 fprintf(stderr, "\t-s --subject [0-2]\tControl header printing:\n");
75 fprintf(stderr, "\t\t\t\t0 = never\n");
76 fprintf(stderr, "\t\t\t\t1 = once\n");
77 fprintf(stderr, "\t\t\t\t2 = every 20 lines (default))\n");
78 fprintf(stderr, "\t-w --width n,n,n,...\tWidth for each field\n");
79 fprintf(stderr, "\n");
80
81 exit(exit_code);
82 }
83
84 struct field_param {
85 const char *name;
86 struct lnstat_field *lf;
87 struct {
88 unsigned int width;
89 } print;
90 };
91
92 struct field_params {
93 unsigned int num;
94 struct field_param params[MAX_FIELDS];
95 };
96
print_line(FILE * of,const struct lnstat_file * lnstat_files,const struct field_params * fp)97 static void print_line(FILE *of, const struct lnstat_file *lnstat_files,
98 const struct field_params *fp)
99 {
100 int i;
101
102 for (i = 0; i < fp->num; i++) {
103 const struct lnstat_field *lf = fp->params[i].lf;
104
105 fprintf(of, "%*lu|", fp->params[i].print.width, lf->result);
106 }
107 fputc('\n', of);
108 }
109
print_json(FILE * of,const struct lnstat_file * lnstat_files,const struct field_params * fp)110 static void print_json(FILE *of, const struct lnstat_file *lnstat_files,
111 const struct field_params *fp)
112 {
113 json_writer_t *jw = jsonw_new(of);
114 int i;
115
116 jsonw_start_object(jw);
117 for (i = 0; i < fp->num; i++) {
118 const struct lnstat_field *lf = fp->params[i].lf;
119
120 jsonw_uint_field(jw, lf->name, lf->result);
121 }
122 jsonw_end_object(jw);
123 jsonw_destroy(&jw);
124 }
125
126 /* find lnstat_field according to user specification */
map_field_params(struct lnstat_file * lnstat_files,struct field_params * fps,int interval)127 static int map_field_params(struct lnstat_file *lnstat_files,
128 struct field_params *fps, int interval)
129 {
130 int i, j = 0;
131 struct lnstat_file *lf;
132
133 /* no field specification on commandline, need to build default */
134 if (!fps->num) {
135 for (lf = lnstat_files; lf; lf = lf->next) {
136 for (i = 0; i < lf->num_fields; i++) {
137 fps->params[j].lf = &lf->fields[i];
138 fps->params[j].lf->file->interval.tv_sec =
139 interval;
140 if (!fps->params[j].print.width)
141 fps->params[j].print.width =
142 FIELD_WIDTH_DEFAULT;
143
144 if (++j >= MAX_FIELDS - 1) {
145 fprintf(stderr,
146 "WARN: MAX_FIELDS (%d) reached, truncating number of keys\n",
147 MAX_FIELDS);
148 goto full;
149 }
150 }
151 }
152 full:
153 fps->num = j;
154 return 1;
155 }
156
157 for (i = 0; i < fps->num; i++) {
158 fps->params[i].lf = lnstat_find_field(lnstat_files,
159 fps->params[i].name);
160 if (!fps->params[i].lf) {
161 fprintf(stderr, "Field `%s' unknown\n",
162 fps->params[i].name);
163 return 0;
164 }
165 fps->params[i].lf->file->interval.tv_sec = interval;
166 if (!fps->params[i].print.width)
167 fps->params[i].print.width = FIELD_WIDTH_DEFAULT;
168 }
169 return 1;
170 }
171
172 struct table_hdr {
173 int num_lines;
174 char *hdr[HDR_LINES];
175 };
176
build_hdr_string(struct lnstat_file * lnstat_files,struct field_params * fps,int linewidth)177 static struct table_hdr *build_hdr_string(struct lnstat_file *lnstat_files,
178 struct field_params *fps,
179 int linewidth)
180 {
181 int h, i;
182 static struct table_hdr th;
183 int ofs = 0;
184
185 for (i = 0; i < HDR_LINES; i++)
186 th.hdr[i] = calloc(1, HDR_LINE_LENGTH);
187
188 for (i = 0; i < fps->num; i++) {
189 char *cname, *fname = fps->params[i].lf->name;
190 unsigned int width = fps->params[i].print.width;
191
192 snprintf(th.hdr[0]+ofs, width+2, "%*.*s|", width, width,
193 fps->params[i].lf->file->basename);
194
195 cname = fname;
196 for (h = 1; h < HDR_LINES; h++) {
197 if (cname - fname >= strlen(fname))
198 snprintf(th.hdr[h]+ofs, width+2,
199 "%*.*s|", width, width, "");
200 else {
201 th.num_lines = h+1;
202 snprintf(th.hdr[h]+ofs, width+2,
203 "%*.*s|", width, width, cname);
204 }
205 cname += width;
206 }
207 ofs += width+1;
208 }
209 /* fill in spaces */
210 for (h = 1; h <= th.num_lines; h++) {
211 for (i = 0; i < ofs; i++) {
212 if (th.hdr[h][i] == '\0')
213 th.hdr[h][i] = ' ';
214 }
215 }
216
217 return &th;
218 }
219
print_hdr(FILE * of,struct table_hdr * th)220 static int print_hdr(FILE *of, struct table_hdr *th)
221 {
222 int i;
223
224 for (i = 0; i < th->num_lines; i++) {
225 fputs(th->hdr[i], of);
226 fputc('\n', of);
227 }
228 return 0;
229 }
230
231
main(int argc,char ** argv)232 int main(int argc, char **argv)
233 {
234 struct lnstat_file *lnstat_files;
235 const char *basename;
236 int i, c;
237 int interval = DEFAULT_INTERVAL;
238 int hdr = 2;
239 enum {
240 MODE_DUMP,
241 MODE_JSON,
242 MODE_NORMAL,
243 } mode = MODE_NORMAL;
244 unsigned long count = 0;
245 struct table_hdr *header;
246 static struct field_params fp;
247 int num_req_files = 0;
248 char *req_files[LNSTAT_MAX_FILES];
249
250 /* backwards compatibility mode for old tools */
251 basename = strrchr(argv[0], '/');
252 if (basename)
253 basename += 1; /* name after slash */
254 else
255 basename = argv[0]; /* no slash */
256
257 if (!strcmp(basename, "rtstat")) {
258 /* rtstat compatibility mode */
259 req_files[0] = "rt_cache";
260 num_req_files = 1;
261 } else if (!strcmp(basename, "ctstat")) {
262 /* ctstat compatibility mode */
263 req_files[0] = "ip_conntrack";
264 num_req_files = 1;
265 }
266
267 while ((c = getopt_long(argc, argv, "Vc:djpf:h?i:k:s:w:",
268 opts, NULL)) != -1) {
269 int len = 0;
270 char *tmp, *tok;
271
272 switch (c) {
273 case 'c':
274 count = strtoul(optarg, NULL, 0);
275 break;
276 case 'd':
277 mode = MODE_DUMP;
278 break;
279 case 'j':
280 mode = MODE_JSON;
281 break;
282 case 'f':
283 req_files[num_req_files++] = strdup(optarg);
284 break;
285 case '?':
286 case 'h':
287 usage(argv[0], 0);
288 break;
289 case 'i':
290 sscanf(optarg, "%u", &interval);
291 break;
292 case 'k':
293 tmp = strdup(optarg);
294 if (!tmp)
295 break;
296 for (tok = strtok(tmp, ",");
297 tok;
298 tok = strtok(NULL, ",")) {
299 if (fp.num >= MAX_FIELDS) {
300 fprintf(stderr,
301 "WARN: too many keys requested: (%d max)\n",
302 MAX_FIELDS);
303 break;
304 }
305 fp.params[fp.num++].name = tok;
306 }
307 break;
308 case 's':
309 sscanf(optarg, "%u", &hdr);
310 break;
311 case 'w':
312 tmp = strdup(optarg);
313 if (!tmp)
314 break;
315 i = 0;
316 for (tok = strtok(tmp, ",");
317 tok;
318 tok = strtok(NULL, ",")) {
319 len = strtoul(tok, NULL, 0);
320 if (len > FIELD_WIDTH_MAX)
321 len = FIELD_WIDTH_MAX;
322 fp.params[i].print.width = len;
323 i++;
324 }
325 if (i == 1) {
326 for (i = 0; i < MAX_FIELDS; i++)
327 fp.params[i].print.width = len;
328 }
329 break;
330 default:
331 usage(argv[0], 1);
332 break;
333 }
334 }
335
336 lnstat_files = lnstat_scan_dir(PROC_NET_STAT, num_req_files,
337 (const char **) req_files);
338
339 switch (mode) {
340 case MODE_DUMP:
341 lnstat_dump(stdout, lnstat_files);
342 break;
343
344 case MODE_NORMAL:
345 case MODE_JSON:
346 if (!map_field_params(lnstat_files, &fp, interval))
347 exit(1);
348
349 header = build_hdr_string(lnstat_files, &fp, 80);
350 if (!header)
351 exit(1);
352
353 if (interval < 1)
354 interval = 1;
355
356 for (i = 0; i < count || !count; i++) {
357 lnstat_update(lnstat_files);
358 if (mode == MODE_JSON)
359 print_json(stdout, lnstat_files, &fp);
360 else {
361 if ((hdr > 1 && !(i % 20)) ||
362 (hdr == 1 && i == 0))
363 print_hdr(stdout, header);
364 print_line(stdout, lnstat_files, &fp);
365 }
366 fflush(stdout);
367 if (i < count - 1 || !count)
368 sleep(interval);
369 }
370 break;
371 }
372
373 return 1;
374 }
375